Appreciated if you could share with me an offline installer for SQL Server 2016 Express edition to me for download.
Thank you in advance.
Does SQL Server all Express Editions are free?
SQL Server 2016 Express SP1: https://www.microsoft.com/en-us/download/details.aspx?id=54284
Below links are for SQL Server 2016 with SP1 Express Edition (English):
all SQL Server Express Editions are free, from 2005 until 2017. Additionally, Developer Edition (same features of Enterprise but only for tests) are as well totally free for versions 2014/2016/2017.